Machine for swaging wire



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W. G. ALLEN. MACHINE FOR SWAGING WIRE. No. 597,756. A Patented Jan. 25,.1898.

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W. G. ALLEN.

MACHINE FOR SWAGING WIRE.

No. 597,756. Patented Jan. 25,1898.

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. W. G. ALLEN, MACHINE YFOR SWAGING WIRE. No. 597,756. Patented Jan. 25,1898t p PATENT FFICE.

YVILLIAM G. ALLEN, OF HARTFORD, CONNECTICUT.

MACHINE FOR S'WAGING WIRE.

SPECIFICATION forming part of Letters Patent No. 597,756, dated January25, 1898.

Application led July 29, 1897. Serial No. 646,280. (No model.)

To @ZZ whom may concern:

Be it known that I, WILLIAM G. ALLEN, of Hartford, Connecticut, haveinvented a new and useful Improvement in Machines for Swaging Wrire,which improvement is fully set forth in the following specification.

The object of this invention is to increase the durability andefliciency of machines for swaging Wire-such, for example, as machinesfor making Wire spokes.

In sWaging-machines the rapid and violent strokes on the dies quicklyproduce Wear and damage to various parts of the mechanism. This Wear anddamage are found to be greatestat the time when there is no stockbetween the dies, at which time the latter are loose and the strokes ofthe driving-cam cause great concussion and rapid injury.

'The present invention includes means whereby the dies are automaticallymoved and held out of contact With the driving-cam while they are notacting upon the stock. Thus the Wear is confined to thetime when thedies are actually operating on the stock and when the Wear is at aminimum.

It has been found that the chucks ordinarily used in machines of thisdescription do not grip the slender` wire as tightly as is necessary toprevent all slip and insure proper action. The invention embraces animproved chuck which accomplishes this result and vis attended Withother advantages, as will be fully set forth.

The several features ofmy invention will be best understood by referenceto the accompanying d1a\vings,\vherein is illustrated What has beenfound to be a practically-successful embodiment thereof in asWaging-machine, and Wherein-- Figure l is a plan View. Fig. 2 is aneleration from the right of Fig. l of a portion of the machine. Fig. 3is a plan of Fig. 2, parts being omitted to show the locking device forthe carriage or slide. Fig. llis a detail of the bracket, in which thelatch for locking thecarriage is pivoted. Fig. 5 is a longitudinalvertical section through the chuck for holding the Wire during theswaging operation. Fig. 6 is a longitudinal horizontal section of thesame. Fig. 7 is an end lview of the chuck, looking from the left of Fig.5. Fig. 8 is an end view of the chuck- George J. Capewell and myself onuthe 30th day of June, 1896.

Referring to the drawings, A2 represents the main driving-shaft, K thebed of the machine, and K a frame in which the parts of the swagingmechanism are mounted, said frame being supported by the bed.

R and G4 are shafts for operating the two dies of the swaging mechanism,respectively.

g is the vibratory die of the swaging mechanism, carried by slide g andreceiving its rapid vibratory movement from a large rotating cam-Wheel Gof the construction described in the patent referred to.

72, is the adjustable or anvil die, carried by a slide h and moved toadjust its position by means of cam-wheel I-I on shaft R'.

As thus far described the parts are the same as corresponding-parts ofthe patented machine. 'lhe means whereby the dies are automaticallymoved and held out of contact with the driving-cam G While not actingupon the stock, constituting one of the features of mypresentpinvention, will now be described.

c is a lug or projection on the upper face of slide g', extending intothe under side of a recessed bridge-piece V, overhanging the y slide.top of the bridge-piece V, and adjustable stopbolts o2 pass through thesides of the bridgepiece into the interior thereof and act to limit themovement of slide g in either direction by engagement With projection c.

A rocking lever IV, pivoted at it', carries at one end a friction-Wheel1o', bearing aga-inst a cam-Wheel W on the side of cam-Wheel H, and atits other end an adjustable Wedge to2,

An opening o' is provided through the projecting through the opening o'in the top of bridge-piece V and adapted to engage the projection o.Vheel w is held in contact with cam W by means of a springing, pressingagainst the top of the lever. In operation when a wire spoke or similararticle is being operated upon bythe dies the Wheel w' IOO rests againstthe shallow part of cam VV; but as soon as the operation is completedand the work withdrawn from between the dies the elevated portion of thecam comes into operation, tilting lever lVaud lowering wed ge 102 intoengagement with projection r1;,whereby slide g is held forward out ofposition for engagement of cam-wheel G therewith and thereby preventinginjury and wear o-n the faces of the dies, as already explained. Thisposition of the parts is maintained until wheel w drops off the elevatedportion of the cam, when a new length of stock is introduced between thedies and the swaging proceeds.

Coming now to the improved chuck for gripping and drawing the stockbetween the swagingdies, L represents a slide or carriage mounted insuitable ways on base-plate K and adapted to be moved longitudinally bylever L', pivoted at L3 to an adjustable frame S and operated by acam-groove in the periphery of a drum L2 on shaft A2. The end of saidlever engages over stud Z on the carriage. Hollow spindle or sleeve M ismounted in bearings M2 M2 on the carriage and rotated by means of pulleyM3, said bearings having bushings M4 M4. At one end spindle M isexteriorly screw-threaded for engage-V ment witha set-nutm andinteriorly threaded for engagement of a plug on', which latter iscentrally perforated, forming a bearing fora plunger m2, having a headon its inner end against which presses a coiled spring m3, said springbearing at its other end against a disk m4, secured in the sleeve M.

'n n are the jaws of the chuck, pivoted at n' between the forkedextensions N of sleeve M and arranged to be operated from a bar O,sliding in sleeve M, by means of a toggle connection consisting of linkso o, pivoted on opposite sides ofthe free ends of jaws n n 'and to earso o on opposite sides of the pro-v jecting end of bar O, as shown, saidears being formed by a link passing through and projecting from oppositesides of an opening through the squared end of the bar.

n2 is a guide secured to the ends'of extensions N N. l

In the position indicated in Fig. 5 the jaws of the chuck are closed asin the act of gripping the stock, the links o 0 of the toggle connectionassuming a vertical position. vThe opening of the jaws for the purposeof releasing the stock is effected by a longitudinal movement of the barO, (to the left in Fig. 5,) whereby the upper ends of the jaws are drawntoward each other, as will be clearly understood, and the gripping-facesof the jaws moved farther away from each other. The longitudinalmovelnent of the bar O for the purpose here referred to is effected by acam-groove p in the periphery of a Wheel P on shaft R by connectionswhich I will now describe.

Q is a collar sliding on sleeve M andA having a pin q, passing throughlongitudinal `wheel P by the means described.

slots in the sleeve and fitting tightly in a transverse opening in barO. Collar Q has a peripheral groove q', into which projects a pin r on alever R, pivoted at one side of the carriage and having its free endextended into the path of suitable stops hereinafter referred to. On itsunder side lever R has a tooth r', (see Figs. l and 6,) adapted to beengaged by a spring-catch r2 to hold the chu ck -j aws either in an'open or a closed position.

T is a'rod mounted to have a limited sliding movement in bearings t tonframe KQ said reciprocation being i mparted to the rod by a lever T',pivot'ed at t', engaging at one end between fixed collars on the rod andat its other end carrying a pin projecting into the cam-groove poffwheel P.

i2 and t3 are stops on rod T in they path of lever B., stop t2 foreffectingthe closure of the chuck-jaws being fixed, and stop i2 foreffecting the opening of the chuck-jaws being adjust-able onthe rod byengagement with a screw-thread formed thereon, the point at which it isdesired to open the chuck to release the stock being dependent upon thelength of the stock, which may be variable.

The closing of the jaws against the stock is effected by a quick jerkymovement translnitted thereto from an offset in groove p of It is ofimportance that the carriage at this time be held in an absolutely-iixedposition7 as any slight movement `thereof may have the effect of causingtoo short a grip being taken on lthe stock. To prevent this, means areprovided for momentarily locking the carriage, such means consisting ofa latch U, pivoted at n to a bracket U', adjustably secured to frame K.The latch has at one end a roller u', held in contact with the peripheryof a disk U2 on shaft R through the action of a spring u2. Disk U2 hasadepression its in its peripheral surface, into which the roller u dropsduring the rotation of the disk, thereby lowering the free end of leverU into engagement with a recess n4, formed in the edge of a block n.5,secured to the carriage, thereby locking the latter so long as theroller runs in the depression.

Referring now to the means for ejecting the work from the chuck aftertheswaging has been completed, '.ris arod extending from plunger 'm2, Fig.5, at one end of sleeve lll, through spring m2, a perforation in diskm4, a longitudinal central opening through bar O and parts associatedtherewith, its free end terminating (in the normal position of the rod)close to the chuck-jaws.

Y is an overhan ging support on carriage L, to the outer end of which ispivoted an arm y, the free end of which extends to a position in frontof the projecting end of plunger m2. The swinging movement of arm y islimited by a stop y', secured to support Y.

z is a stop of rod T, adapted to make contact with arm y as the carriagereaches the limit of its travel, causing the arm to press IIO izo

the plunger inward against the tension of spring m3, sliding rodforward, so that its outer end passes between the chuck-jaws and ejectsthe work. In its position of rest the forward end of rod c acts as anadjustable stop to determine the length of stock introduced between thechuck jaws, the adjustment being effected by screwing the plug -m/ in orout.

The operation of the machine is as follows: A length of stock to beswaged is passed between the swaging-dies and between the jaws n n ofthe chuck until its end abuts against the end of rod which has beenadjusted to the proper position in accordance with the length of thestock, as already described. At this instant,the carriage being lockedby latch U, an odset in groove p of wheel P imparts a quick movement tolever T', reciprocating bar T and swinging lever R to the right, Fig. l,moving bar O in a corresponding direction and closing the jaws tightlyagainst the stock, in which position spring-catch r2 rests on theleft-hand side of tooth tr"on lever R, Fig. l. The roller w' now dropsinto the shallow part of cam YV', lifting wedge w2 out of engagementwith projection o and permitting camwheel Gto vibrate slide g'. At thesame time latch U is lifted out of engagement with slot fri-Sand themovement of the carriage by camwheell'andleverLcommences. Thismovementof the carriage continues until lever R arrives in front of stop t3, atwhich instant a second oset in groove p of wheel P comes into operationto quickly reciprocate rod T 'to the left, operating the parts to openthe chuck-jaws, as will be clearly understood. At about the same timelever y strikes against stop s, imparting a longitudinal movement to roda: and ejecting the finished article, which at this time rests looselybetween the open jaws. The return movement of the carriage now begins,the chuck-jaws being held open by spring catch r2, engaging on theright-hand side of tooth fr'.

Having thus described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

l. In a swaging-machine, the combination with the dies, and adriving-cam for imparting a vibratory movement to one of the dies, ofmeans for automatically moving the vibratory die to, and positivelyholding itin, an inoperative position with reference to the driving-cam,substantially as described.

2. In a swaging-machine, the combination with the dies, a slide on whichone of the dies is mounted, and 'a driving-cam for imparting a vibratorymovement to said slide, a projection on the slide, a rocking lever, achuck or projection on said lever, and means tor automatically rockingthe lever to engage the chuck with the projection on the slide formoving and holding the latter out of operative relation with thedriving-cam during periods when there is no stock between the dies,

substantially as described.

3. In a chuck,the combination with a sleeve, chuck-jaws pivoted at oneend of said sleeve, a bar sliding in the sleeve, toggle-jointsconnecting the free ends of the chuck-jaws with the bar, and means forreciprocating the bar, substantially as described.

4. In a rotary chuck the combination with a sleeve, of a bar sliding insaid sleeve, jaws pivoted to the end of the sleeve and extending topositions about the end of the bar, pivoted links connecting the end ofthe bar to the jaws forming toggle-joints, and means for imparting alongitudinal sliding movement to the bar to open and close the jaws,substantially as described.

5. The combination with a longitudinallymovable carriage and means formoving the same, of chuck-jaws movableon the carriage,` means foroperating the chuck-jaws to grip and release the stock, an adjustablestop for the stock in the rear of the jaws, and means for automaticallymoving said stop at a predetermined point in the travel of the carriageto eject the stock from between the jaws, substantially as described.

6. The combination with a longitudinallymovable carriage and means formoving the same, a sleeve mounted in bearings on the carriage, means forrotating the sleeve, chuckjaws pivoted to one end of the sleeve, a barsliding in the sleeve and connected at its outer end to the chuck-jawsby suitable togglejoints, means for reciprocating the bar to open andclose the jaws, a plug in the other end of the sleeve, a plunger slidingin and projecting from an opening'through the plug, a spring pressingagainst the inner end of the plunger, a rod secured at one end to theplunger and extending through a central perforation in thechuck-operating bar, terminating at'a point in proximity to thechuck-jaws and acting as a stop for the stock fed thereto, and means forautomatically reciprocating the plunger and rod at a predetermined pointin the travel of the carriage-whereby the latter acts as an ejector fordischarging the stock from the chuck, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM G. ALLEN'.

Witnesses Lnwis SPERRY, EMELYN PETHERBRIDGE.

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